Fig 1.
The layout of the patient rooms in which the air sampling for influenza A virus was conducted.
The figure shows the usual positions for which the furniture, medical devices and the stationary air sampling device are located in one of the two patient rooms where the air sampling was conducted, although they are freely to be moved around (border in red). The other inpatient room is the mirror image of the first. For example if Bed 1 was the sampling bed, the air sampling device could be located at either ‘Centre’ or ‘Side’ as illustrated in the diagram. The dimensions of the two patient rooms where the air samplings were conducted were also provided. NIOSH: the air sampling device; Blue line: inlet vent; Green line: outlet vent.
Table 1.
Recovery of influenza A virus RNA in air in 2-bed inpatient rooms with at least one patient with laboratory-confirmed influenza A virus infection.
Fig 2.
Scatter plots of the concentration of influenza virus RNA detected in the air (influenza virus RNA particles/m3 of air) versus relative humidity (A), absolute humidity (B), temperature (C) and the height of the sampler (D).
Dot indicates the concentration of RNA copies of influenza virus recovered from a sampler set at 1.5 m from the floor, and square indicates that from a sampler set at 1.0 m from the floor.
Fig 3.
Scatter plots of the concentration of influenza virus RNA detected in the air versus (A) age and (B) sex of the patient with laboratory-confirmed influenza A infection, and (C) number of patients with laboratory-confirmed influenza A infection in the room.
If there were more than one patient with laboratory-confirmed influenza A infection in the room, the data of the patient on the sampling bed was used. Dot indicates the concentration of RNA copies of influenza virus recovered from a sampler set at 1.5 m from the floor, and square indicates that from a sampler set at 1.0 m from the floor.